USB MUX: Remove mux set from HPD update
USB MUX: Remove mux set from HPD update

Now that the BB retimer has its own HPD update function, the extra mux
set can be removed from the general USB mux code.

BRANCH=None
BUG=b:195773400
TEST=on voxel, pass tast typec.Mode*.manual

Signed-off-by: Diana Z <cb2016afc7183e5356c690dc63b4ba817470501a@chromium.org>
Change-Id: Ica83c2c568799d7686d8cfdbc5b0f446a6ebcb8f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3163931
Reviewed-by: Keith Short <f6d578f97033c25f1206cb57d52f358974c82954@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec